collom



, 2 Sheets-Sheet l.

M. H. COLLOM.

SPEED GOVERNOR.

170.417,770. ,Patented Dec. 24, 1889.

` UNITED STATES PATENT OFFICE.

MARTIN H. COLLOM, OF DENVER, COLORADO, ASSIGNOR TO THE OOLLOM STEAM PUMPGOVERNOR COMPANY, OF SAME PLACE.

SPEED-GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 417,770, dated December24, 1889. Application filed April 6, 1889i Serial No. 306,210. (Nomodel.)

T a/ZZ whom t 77mg concern: fect control of the steam-supply ismaintained. Be it known that I, MARTIN H. OOLLOM, of Should thewater-supply fail and the pump Denver, in the county of Arapahoe andState merely suck air, the main valve will remain of Colorado, haveinvented a new and usei'ul-y closed, because, there being but littleresist- 55 Improvement in Speed-Governors1 which imance to the motionsof the pump-cylinder, but provenient is fully set forth in the followinglittle steam will be called for, and this the SDGCCWDOH by-pass valvewill secure.

My invention has reference to speed-regu` The invention includes certainspecial fealators particularly designed for steam-pumps, tures ofconstruction and combinations of 6o 1o though the improvements maywholly or in` parts, as hereinafter described.

v part be applied to other purposes, as will' Referring to theaccompanying drawings, readily be understood by those skilled in thewhich form part of this specification, Figure art to which the inventionrelates. I is a horizontal section of a regulator con- The object of theinvention is to furnish a structed in accordance with the invention; 65

regulator which maybe used as an attachment Fig. Il, a vertical sectionthrough the main to steam-pumps whether new or already in valve on lineIl, Fig. I; and Fig. III,4 a vertiuse, which will supply to the pistonjust the cal section through the governor-cylinder on amount of steamnecessary to do the work reline Ill, Fig. l. quired and no more, andwhich will auto- The chamber A, approximately spherical 7o 2o maticallycut off the supply of steam and in form, is adapted to be connected inthe slow down the speed of the piston in case of steam-pipe at anysuitable point between the failure in the supply of water or otherliquid, boiler and pump, the steam entering at aand thus preventing thepump from running away discharging at b. The main valve, which is andavoiding the damage that would result inclosed in said chamber andcontrols the 75 EheleflOHlpassage of steam to the discharge-pipe b,con

In carrying out this invention the steamsists of a rod or plug B,adapted to move in supply pipe is provided with a main regulatatransverse opening through said pipe b, ing-valve, which in its normalposition or powhich is closed at the upper end, as shown, sition of restcloses said pipe. The valveand provided with crossheads C and caps D 8o3o stem of this main valve is connected withand D', which constitute thevalves proper, and operated bya pressure-actuated device, which arenormally pressed by springs d against may be a piston working in asuitable cylinvalve-seats e. The plug B is provided with der connectedby pipes with either the steam wings E, the spaces between which allowthe or water cylinder Vof the pump, but prefersteam to pass freely wheneither cap D or D 85 3 5 ably with the former. The main valve being isopen. Gap D has a guide-stem f, which normally closed/the pump is runata minimum plays in a hole in screw-plug g, which closes speed underlight duty bya small amount of the side of the chamber. Cap D can slideon steam supplied by a suitable by-pass valve. the rod F, to which plugB is connected, and When, however, the steam thus supplied is whichpasses through a stuffing-box in the 9o 4o insufficient to move thepiston against the side of chamber A. It will be noted that in pressureopposed to it, the pressure accumuthe position of the parts as shown inthe lates behind the pump-piston and is immedidrawings, (which is thenormalpositiom) the 4ately communicated to the valveactuating main valveis closed; but if the rod F moves piston, causing it to open the mainvalve and inward cap D will be lifted, (cap D remain- 95 pass the amountof steam required to operate ing closed,) allowing steam to enter pipel) the pump-piston. As soon as the pump-cylfrom chamber A. lt rod Fmoves outward, inder exhausts at the end of each stroke, the cap D willbe lifted in like mannen It will Vmain valve at once returns to itsnormal po-- also be noted that if the valve be open on sition, cuttingoff the steam. This closing of either side it must be fully closedbefore it roo 5o the main valve at each stroke is an important can openon the other.

feature of the invention, since thereby per- G represents a smallby-pass valve in pipe b, through which a certain regulated amount ofsteam is supplied to the steam-cylinder. Stem g of this valve isthreaded and passes through'a threaded boss in the Wall of chamber A, sothat by turning said stem the size of the valve-opening can beregulated.

The main valve is actuated by the governor-piston H, which works in acylinderI alongside of the valve-chamber A. The rod 7L of this piston-isconnected with the stem F of the main valve by a lever K, pivoted atv lcin an adjustable fulcrum piece or bracket L. Said fulcrum piece orbracket is made adjustable, so that the motion imparted to stem' F fromrod h may be made relatively greater or less, as desired.

Piston H normally (fi. e., when the main valve is closed) rests at aboutthe center of cylinder I, being controlled by the springactuated rod M,with which piston-rod h is connected at each end by bars m, so that thepiston H follows the motions of said rod. Rod M is supported in openingsin lugs n, which are part of the casting of cylinder I, said rod beingprovided with sleeves 0 o' fixed thereon. Sleeve o is of such size as tot loosely in the opening4 in one of lugs n aforesaid, while sleeve ofits in a compression-nut O, which is screwed into the other lug.Collars p p are mounted loosely on rod M, and between them is a spiralspring N, which bears at opposite ends against said collars. Anymovement of piston H will compress spring N in one direction or theother, and when the force-moving piston His withdrawn said spring willreturn the parts to their normal position.

The pipes q q connect cylinder-I with either the steam or water cylinderof the pump and are provided with ordinary plug-valves r. The pipes q qcommunicate with opposite sides of the gov ernor-pist'on H, and theirother ends are likewise connected with opposite sides of thepump-piston.

The operation of the regulator when connected with the steam end of thepump is as follows: The by-pass valve G is opened far enough to furnishsufficient steam to run the pump at a minimum speed and under the'lightest duty. So long as this valve passes sufficient steam to overcomethe pressure opposed to the working-piston, the main valve remainsclosed; but whenever the water-pressure is above this limit the speed ofthe pumppiston is checked and steam begins to accumulate behind it. Thispressure is communicated by one of the pipes q to the correspending sideof governor-piston H, forcing the latter from the center of its cylinderI toward one end thereof, carrying with it rod M, and therebycompressing spring N. The motion of piston H is communicated throughlever K to the stem F of the main valve, which thereupon moves off itscenter, opening either cap D' or D and allowing the requisite quantityof steam to pass into pipe b. The pump-piston is thereby moved to theend of its stroke and the cylinder exhausts, relieving the pressure ingovernor-cylinder I and permitting the pressure of spring N to returnpiston H to its normal position, thereby closing the'main valve. It maybe that on the return-stroke of the pump-piston more steam will berequired than is supplied by the by-pass valve, when the same operationwill be repeated, except that the main valve will moye in the oppositedirection. So long as this condition continues, the governor-piston (andconsequently the main valve) will move back and forth with each strokeof the pump-piston; but the main valve closes at each reciprocation,thus cutting off and renewing lthe supply of steam at each stroke of thepiston in such quantity as may be necessary to move the latter. Shouldthe conditions of workin g suddenly change-as, for example, by thesupply of water giving outthe main valve would remain closed, since thesteam supplied through the by-pass valve would run the pump-piston sofast as to prevent accumulation of pressure. By attaching the pipes q qto the water-cylinder of the pump the action would be the same, thepiston H in that case being operated by water instead of steam. Onaccount, however, of the grit and sediment conta-ined in the water it ispreferable to connect the governor-cylinder with the steam end of thepump.

To connect the regulator with steam-pumps already in use, it is onlynecessary to tap the main steam-pipe and connect chamber A therein, andto connect the steam lor water cylinder with the governor-cylinder I bythe small pipes q.

It is obvious that modifications may be made in the details ofconstruction shown and described without departing from the spirit of myinvention,and that parts thereof may beused without the whole.

Having now fully explained the principle of my invention and the mannerin which the same may be practically carried out, what I claim, anddesire to secure byLetters Patent, 1s-

l. In a regulator, the combination, with a steam-supply pipe, of abalanced valve normally closing said pipe, but adapted to open by motionin either direction, a valve-actuating device or piston, a chamber orcylinder therefor connected on both sides of said piston with the steamor water cylinder, and a spring tending to close the main valve, so thatsaid main valve must completely close after each stroke before it canopen to supply the steam for the succeeding stroke, substantially asdescribed.

2. The combination of the normally-closed balanced main valve, thegovernor-piston and .cylinder for actuating the same, and the bypassvalve, substantially as described.

3. The combination, with the balanced main valve and the by-pass valve,of the governorcylinder provided with pressure-communicating pipes ateach end of the governor-piston,

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a spring holding said piston normally at about the center of saidcylinder, and a lever connecting the rod of said piston with the stem ofthe main valve, substantially as described.

4. The combinatio11,with the governor-cylinder and piston adapted foroperation by variations of pressure, of a balanced valve seated in thesupply-pipe and normally closing the same, but adapted to open in eitherdirection, connections between said piston and said valve, a springcontrolling` the positions of said parts, and a by-pass valve in saidsupply-pipe, substantially as described.

5. The combination, With the pressure-actuated governor-piston, of anormally-closed balanced valve in the supply-pipe, said Valvecomprising' caps normally closing` ports on opposite sides of said pipe,a valve-stem and cross-heads ltlnereon adapted by the motion of saidstem to unseat one or the other of said caps, substantially asdescribed.

6. The combination of the normally-closed balanced main Valve adapted toopen by Inotion in either direction, the by-pass valve, thegovernor-cylinder having pipes for connection with the steam or Watercylinder, the piston of said governor-cylinder, an actuat-^ ing rodconnected With the piston -1'od, a spring` surroundingI said rod andadapted to be compressed by thelatters motion in either direction, and alever connecting the rod of the governor-piston with the vmainvalvestem, substantially as described.

In testimony whereof I have signed this specication in the presence oftwo subscribing` Witnesses.

MARTIN H. COLLOM.

Witnesses:

B. D. ALLEN, ORLANDO KLING.

